.title{
    font-weight: bold;
    text-align: center;
    font-size: 30px;
    margin: 5px;
}
.score{
    text-align: center;
    font-size: 20px;
}

#main {
    width: 400px;
    height: 500px;
    background: white;
    border: 2px solid gray;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.con {
    width: 100%;
    height: 400px;
    position: relative;
    top: -100px;
    border-collapse: collapse;
}

.row {
    height: 100px;
    width: 100%;
}

.cell {
    height: 100px;
    width: 100px;
    float: left;
}

.black {
    background: black;
}

.start {
    margin-top: 20px;
    width: 150px;
    height: 50px;
    border-radius: 10px;
    background: yellowgreen;
    line-height: 50px;
    text-align: center;
    color: #fff;
    position: absolute;
    top: 10px;
    left:10px;
}
.pause {
    margin-top: 20px;
    width: 150px;
    height: 50px;
    border-radius: 10px;
    background: rgb(223, 94, 94);
    line-height: 50px;
    text-align: center;
    color: #fff;
    position: absolute;
    top: 80px;
    left:10px;
}
.over {
    margin-top: 20px;
    width: 150px;
    height: 50px;
    border-radius: 10px;
    background: rgb(233, 18, 18);
    line-height: 50px;
    text-align: center;
    color: #fff;
    position: absolute;
    top: 150px;
    left:10px;
}